Not Your Grandpa's C++

If you look at C++ code from 1995 and C++ code from 2024, they look like different languages. Modern C++ is much safer, faster, and easier to write.

Key Modern Features:

1. The auto Keyword (C++11)

Let the compiler figure out the type for you.

auto x = 5; // int
auto s = "hello"; // const char*

2. Range-Based For Loops

The easiest way to loop through a container.

for (int x : myVector) { cout << x; }

3. Smart Pointers (Memory Safety)

Forget delete! Smart pointers automatically free memory when no one is using it anymore.

• unique_ptr: One owner only.
• shared_ptr: Multiple owners using reference counting.

4. Lambda Expressions

Functions without names that you can write inside other functions. Great for sorting!

sort(v.begin(), v.end(), [](int a, int b) { return a > b; });

5. Concepts and Ranges (C++20)

Advanced tools that allow you to write "Templates" that are much easier to understand and debug.

If you're starting a new project today, always use at least C++17. It removes many of the "pain points" of older versions.